One vertex per element, one color per generator, with an edge from x to x·s.
(2,6)(3,10)(4,7)(8,13)(11,12)(14,16)(19,25)(20,27)(22,29)(24,31)(26,28)(30,32) involution — undirected(1,2,7,13,5,8,4,6)(3,9,10,16,12,15,11,14)(17,18)(19,22)(20,24)(21,23)(25,29)(26,30)(27,31)(28,32)(2,8)(6,13)(9,15)(14,16)(17,19,21,26)(18,22,23,30)(20,28,27,25)(24,32,31,29)(1,3)(2,9)(4,11)(5,12)(6,14)(7,10)(8,15)(13,16)(18,23)(22,30)(24,31)(29,32) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.